<!DOCTYPE html>
<html>
    <head>
	<title>css子元素选择器（绝对子集）</title>
	<meta charset="UTF-8">
	<style>
	    h1 > span{color: red;}
	</style>
    </head>
    <body>
	<h1><em>感觉到发了几<span>aaaa</span>个地方见过对方两个</em></h1>
	<h1>感觉到发了几<span>aaaa</span>个地方见过对方两个</h1>
    </body>
</html>
